<!--
 * @Author: your name
 * @Date: 2021-10-16 09:42:08
 * @LastEditTime: 2021-10-18 09:46:20
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: \vue_test\src\components\Header.vue
-->
<template>
  <div class="todo-footer" v-show="total">
    <label>
      <!--  <input type="checkbox" :checked="isAll" @change="checkAll" /> -->
      <input type="checkbox" v-model="isAll" />
    </label>
    <span>
      <span>已完成{{ doneTotal }}</span> / 全部{{ total }}</span
    >
    <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "MyFooter",
  props: ["todos", "checkAllTodo", "clearAllTodo"],
  computed: {
    total() {
      return this.todos.length;
    },
    doneTotal() {
      return this.todos.reduce((pre, todo) => pre + (todo.done ? 1 : 0), 0);
    },
    isAll: {
      get(){
          return this.doneTotal === this.total && this.total > 0;
      },
      set(value){
        this.checkAllTodo(value);
      }
    },
  },
  methods: {
    clearAll(){
       if(confirm("确定删除吗？")){
       this.clearAllTodo()
      }
    }
  },
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
